Can I expect an ChannelApe order in PENDING status that corresponds to an active eBay order to ever transition to a different status within ChannelApe?
An eBay Order in PENDING status within ChannelApe could remain that way if it remains in Active order status for more than 30 days. ChannelApe will cease to pull in updates for an eBay order that is older than 30 days.
If the order transitions to Cancelled order status within 30 days then you should see it transition to CANCELED in Channelape. If the order transitions to Completed order status within 30 days then you should see it transition to OPEN in ChannelApe. See OrderStatusCodeType and eBay Pull Orders Mapping for more details.
You may also see a PENDING order go defunct while a new order that looks like a duplicate comes in with OPEN status. This is because according to eBay’s docs, the composition of an eBay order can change while it is in Active status.